Federal Signals Model TELC Extension Ringer Device is a horn and strobe combination signal which is activated by the ringing signal of a telephone system. The TELC is specifically designed for use with an analog telephone. The ringing signal of 40-150VAC, 16-60Hz and local 120VAC power is all that is required to activate a TelCom signal. This TelCom device is intended to be mounted on a vertical surface such as a riding wall or post. The TELC has a three-conductor six-foot 120VAC power cord extending from the unit. Connecting the TelCom device to the telephone network is accomplished by running a modular telephone line cord (RJ11) to an existing jack or a duplex jack (customer supplied) into an existing modular jack. The TELC is designed with a durable zinc die-cast housing painted with gray powder coat enamel, and features an internal solid-state relay.